Recent content by lettertwelve

i believe i should only be left with lbs, but then i can't begin to figure out how i'd get rid of the cm^3

what about this one: solid copper has a density of 8.92 g/mL. How many cm^3 does 0.75 lbs occupy? i did: 8.92g/mL X 1000mL/cm^3 X 1lb/453.59237g i'm missing something i believe, but i don't know what, and how accurate is my lb/g part, as well as where do i put the 0.75lb? if you could...

are you more than 100% sure :P do you have time to check 2 more for me??

Homework Statement A snail travels on average 5.25 cm/minute. How many hours would it take to travel a distance of 1.00km? Homework Equations none The Attempt at a Solution 5.25cm/min X 60min/hr X 1m/100cm X 1km/1000m cm, min, and m cancel out and the answer ends up to be...

Homework Statement The frequency of a tuning fork can be found by the method shown in Figure 13-24. A long tube open at both ends is submerged in a beaker of water, and the vibrating tuning fork is placed near the top of the tube. The length of the air column, L, is adjusted by moving the...

i understand thanks!

thats the answer. thanks!

again, a guess.. so, if V=IR then 169.68=I*190? =.89 i think?

i didnt say i don't remember, because i never knew in the first place...but is it Ohm's law? V=IR?

i know DC and AC have something to do with transformers

i really don't, and honestly i guess for part A. i don't know why I am taking physics, but I am stuck with it. its not that i don't try... i just don't understand :\

i did 240V * .707 (i got .707 from Vrms)

[SOLVED] calculate RMS current!? Homework Statement The maximum potential difference across certain heavy-duty appliances is 240 V. Assume that the total resistance of an appliance is 190 ohms. (a) Calculate the rms potential difference. 169.68V <--CORRECT but for (b) calculate the...

. . . i obviously have no idea ?

Homework Statement A singly charged positive ion with a mass of 6.68 x 10^-27 kg moves clockwise with a speed of 1.10 x 10^4 m/s in a circular path with a radius of 2.00 cm. Find the direction and strength of the magnetic field. (Hint: The magnetic force exerted on the ion is the force that...